Method of fabricating a radiative and conductive thermal metamaterial composite

Patent metadata

Field	Value
Publication number	US-2021283569-A1
Application number	US-202017025193-A
Country	US
Kind code	A1
Filing date	Sep 18, 2020
Priority date	Mar 11, 2020
Publication date	Sep 16, 2021
Grant date	—

Abstract

A method of fabricating a multi-mode heat transfer device includes forming a thermal metamaterial composite structure that includes an inner core to radiate heat and an outer core that at least partially surrounds the inner core. The outer core includes a high thermally conductive material inlay and a low thermally conductive material matrix that form a composite material pattern to thermally concentrate and direct heat radiated by the inner core to an area outside of the multi-mode heat transfer device, while also thermally cloaking heat radiated by the inner core. A plurality of thermal metamaterial composite structures are then stacked in a stacked formation to form a thermal metamaterial composite assembly. The method includes manipulating the emissivity of the thermal metamaterial composite assembly by selectively applying a coating or a plating to one or more outer surface regions of the outer core to enhance the transfer of heat by the composite material pattern.

First claim

What is claimed is:

1 . A method of fabricating a multi-mode heat transfer device, the method comprising:
forming a thermal metamaterial composite structure that includes an inner core to radiate heat and an outer core that at least partially surrounds the inner core, the outer core including a high thermally conductive material inlay and a low thermally conductive material matrix that form a composite material pattern to thermally concentrate and direct heat radiated by the inner core to an area outside of the multi-mode heat transfer device, while also thermally cloaking heat radiated by the inner core; stacking a plurality of thermal metamaterial composite structures in a stacked formation to form a thermal metamaterial composite assembly; and manipulating the emissivity of the thermal metamaterial composite assembly by selectively applying a coating or a plating to one or more outer surface regions of the outer core to enhance the transfer of heat by the composite material pattern.

2 . The method of claim 1 , wherein the composite material pattern comprises a first composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally concentrates and directs heat radiated by the inner core to an area outside of the multi-mode heat transfer device.

3 . The method of claim 2 , wherein the composite material pattern comprises a second composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally cloaks heat radiated by the inner core.

4 . The method of claim 3 , wherein the composite material pattern comprises a third composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally guides heat radiated by the inner core to a specific region in the multi-mode heat transfer device.

5 . The method of claim 1 , wherein selectively applying the coating or the plating comprises selectively applying a mask to the one or more outer surface regions.

6 . The method of claim 5 , wherein selectively applying the mask comprises applying a paint of different emissivity to realize a spatially graded emissivity profile.

7 . The method of claim 1 , wherein selectively applying the coating or the plating comprises selectively plating the exterior surface of the thermal metamaterial composite assembly with different emissivity metal layers.

8 . A method of fabricating a multi-mode heat transfer device, the method comprising:
forming a thermal metamaterial composite structure that includes an outer core having a high thermally conductive material inlay and a low thermally conductive material matrix that form a composite material pattern to thermally concentrate and direct heat radiated by a heat source in the multi-mode heat transfer device while also thermally cloaking heat radiated by the heat source; stacking a plurality of thermal metamaterial composite structures in a stacked formation to form a thermal metamaterial composite assembly; and manipulating the emissivity of the thermal metamaterial composite assembly by selectively applying a coating or a plating to one or more outer surface regions of the outer core to enhance the transfer of heat by the composite material pattern.

9 . The method of claim 8 , wherein the composite material pattern comprises a first composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally concentrates and directs heat radiated by the inner core to an area outside of the multi-mode heat transfer device.

10 . The method of claim 9 , wherein the composite material pattern comprises a second composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally cloaks heat radiated by the inner core.

11 . The method of claim 10 , wherein the composite material pattern comprises a third composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally guides heat radiated by the inner core to a specific region in the multi-mode heat transfer device.

12 . The method of claim 8 , wherein selectively applying the coating or the plating comprises selectively applying a mask to the one or more outer surface regions.

13 . The method of claim 12 , wherein selectively applying the mask comprises applying a paint of different emissivity to realize a spatially graded emissivity profile.

14 . The method of claim 8 , wherein selectively applying the coating or the plating comprises selectively plating the exterior surface of the thermal metamaterial composite assembly with different emissivity metal layers.

15 . A method of fabricating a multi-mode heat transfer device, the method comprising:
forming a thermal metamaterial composite structure that includes an outer core having a high thermally conductive material inlay and a low thermally conductive material matrix that form a composite material pattern to thermally concentrate and direct heat radiated by a heat source in the multi-mode heat transfer device while also thermally cloaking heat radiated by the heat source; and stacking a plurality of thermal metamaterial composite structures in a stacked formation to form a thermal metamaterial composite assembly.

16 . The method of claim 15 , wherein the composite material pattern comprises a first composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally concentrates and directs heat radiated by the inner core to an area outside of the multi-mode heat transfer device.

17 . The method of claim 16 , wherein the composite material pattern comprises a second composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally cloaks heat radiated by the inner core.

18 . The method of claim 17 , wherein the composite material pattern comprises a third composite material pattern region having a structural configuration comprising one or more segments with an orientation which thermally guides heat radiated by the inner core to a specific region in the multi-mode heat transfer device.

19 . The method of claim 15 , further comprising, after stacking the thermal metamaterial composite structures, manipulating the emissivity of the thermal metamaterial composite assembly by selectively applying a coating or a plating to one or more outer surface regions of the outer core to enhance the transfer of heat by the composite material pattern.

20 . The method of claim 8 , wherein selectively applying the coating or the plating comprises selectively applying a mask to the one or more outer surface regions by applying a paint of different emissivity to realize a spatially graded emissivity profile.

Assignees

• Toyota Eng & Mfg North America

Inventors

• Dede Ercan M

Classifications

• G02B1/002

  made of materials engineered to provide properties not available in nature, e.g. metamaterials · CPC title

• H05B3/009 Primary

  heating devices not specially adapted for a particular application · CPC title

• H05B3/48

  heating conductor embedded in insulating material · CPC title

• H05B3/12

  characterised by the composition or nature of the conductive material · CPC title

• B01J19/12 Primary

  employing electromagnetic waves · CPC title